Friction Disk Wear Liner Notch Structure for Torque Transfer
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Solution Overview
Problem
Current aircraft brake systems face torque transfer issues due to the attachment of wear liners via flanges, particularly when the liners are in a worn state, leading to inefficiencies in friction disk assemblies.
Innovation Solution
The use of annular wear liners with notches that protrude from a non-wear surface, which mate with recesses on the friction disk core, allowing for torque transfer without fasteners, enabling easier replacement and reducing material waste, and enhancing manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If wear liners are attached to friction disk core via flanges, then the liners can be replaced, but torque transfer efficiency deteriorates especially when liners are worn
Solution Approach 1:
The wear liner is segmented with multiple notches extending through its thickness, creating discrete engagement points with the friction disk core. This segmentation allows the liner to maintain torque transfer capability through distributed mechanical interlocking, preventing relative rotation even when worn, while still enabling complete replacement when necessary.
Solution Approach 2:
The notches in the wear liner are designed to nest within corresponding recesses of the friction disk core, creating a interlocking relationship. This nested configuration ensures positive mechanical engagement for torque transfer while maintaining the ability to remove and replace the liner as a complete unit.
2Ease of repair
If wear liners use flange attachment, then liners can be replaced, but assembly complexity increases due to fastener requirements
Solution Approach 1:
The design extracts the attachment function from separate fasteners and integrates it directly into the wear liner structure through notches. By taking out the need for external fastening components and incorporating the engagement mechanism into the liner itself, the assembly structure is simplified while maintaining replaceability.
Solution Approach 2:
The attachment mechanism is merged with the wear liner body by forming notches as an integral part of the liner structure. This combining of the liner and attachment features into a single component eliminates separate fasteners and simplifies the overall assembly while preserving the ability to replace the liner.
3Reliability
If wear liners are designed with notches mating with recesses, then torque transfer improves, but manufacturing precision requirements increase
Solution Approach 1:
The notches and recesses are designed with specific local geometric features including inclines and peaks that create self-aligning characteristics. The incline surfaces guide the notches into proper alignment with recesses during assembly, while the peak-to-step contact ensures reliable torque transfer, reducing the need for high overall manufacturing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution improves torque transfer efficiency, simplifies assembly, reduces component costs, and ensures a uniform wear rate across the wear surface, addressing torque transfer problems and enhancing the overall performance of aircraft brake systems.
Implementation Method 1
The peak may be configured to transfer torque from the wear liner to the friction disk core
Data Source
AI summary
A friction disk of a braking system may include a friction disk core and a first wear liner. The friction disk core has an outer surface that defines a recess extending gradually inward from the outer surface, according to various embodiments. The wear liner mates to the outer surface of the friction disk core and includes a wear surface and a first non-wear surface, according to various embodiments. The first wear liner further includes a notch extending gradually outward from the first non-wear surface of the wear liner, according to various embodiments. In an installed state, the notch is received within the recess, according to various embodiments.